Liquid temperature changing device



May 31, 1932 w. A. BARRETT 1,861,292

LIQUID TEMPERATURE CHANGING DEVI'CE Filed Dec. 9, 1930 'd l* /NVENTDH Waller /farret' Zm; El )L A TTOFNEY Patented May 3l, 193? UNITED ,STATES wurm a. mama, of roar wenn, h*immuunv morgan 'rmana'runn cantante nav-rca .1

appnoauon mea member s, ma. aum! no. 501,070.

The invention relates to appliances forl In temperature changing devices, especial-v ly those for use in the dalr industry, it is essential that there shall e no crevices, cracks, joints or other pockets in which the milk or other product being treated can lodge y and become a source of contamination to 'subsequent products being treated. Devices for the purpose have been constructed in which a series of parallel tubes is so mounted that a cooling or heatin medium may Ibe circulated through the tu s andthe product to be treated flows down the outer surfaces of the tubes. The practice has been in vsuch constructions to fill the spaces between the tubes with solder or to weld strips to adjacent tubes and apply solder in the corners in order to secure a surface for the product to flow over. It is most diilicult to prevent cracks or crevices or pockets forming in the fillers and joints and thereby avoid contamination of the product being treated. l,

The obj ect of my invention is to provide a temperature changing device wherein the tubes are so formed as to present a one piece continuous surface over which the product to be treated Hows and thereby avoid all cracks, crevices or pockets in which the product may lodge.

The mvention consists in a series of spaced parallel tubes formed from two channeled sheets of material, the walls of the opposing channels in which sheets, when the spacing portions of the sheets are properly secured together, form tubes, the surface of each tube 'being continuous with the adjacent spacing. portion of the sheet, and means being provided at the op osite ends of the tubes whereby a cooling or eating medium may be circulated through the tubes. 1

The invention is illustrated in the accompanying drawings in which Figure 1 is an elevational view of a device embodying the invention Fig. 2 van end view of the device and Fig. 3 is an enlarged cross section on line 3-3 of Fig. 1.

Referring to the illustrative embodiment of the invention 1 designates the device generally mounted in any convenient manner,

as by the brackets 2 u l n the standards 3, the brackets being securedto the device and suitabrlly attached to the standards.

he tubes 4 extend at opposite ends into the headers 5 and are suitably sealed therein. 55 The-headers are divided by cross artitions 6 into compartments orpassages w ich communicate with the tubes in pairs such that a 'coolin or heating medium which enters at 7 into t e lowermost tube will flow or circulate upwardl through all the tubes in succession and ischarge at 8 from the uppermost tube.

The tubes of selected number are formed as a unit in two corresponding sections 9 35 and 10. Each section comprises a sheet of metal that is preed or otherwise formed into verticallyS spaced semi-cylindrical; transversc channe 11 with substantially flat sections` 12 between adjacent channels and 70 rounding into the walls of those channels so as to avoid square corners or crevices. The portion of the sheet below-the lowermost channel may"J begcup ed to form a trough 13 and the portion o'fP the sheet above 75 the uppermost channel may be. flared out- Wardly and u wardl to form one-half of an upper trouglh 14. 'l`he two channeled sections are assembled with the spacers or substantially flat sections 12 in contactpand the 30 abuttin sections 12 are secured to ther, as by wel ing. The channels of eac section now oppose each othenand form the complete tubes 4, the trough sections 14- form a complete trough and the lower tro hs 13 35 are upon opposite sides of the tubes.: -suitable discharge pipe. 15 is connected to the trou hs 13. The product to be treated is suita ly supplied to tlie upper trough 14 from which it overflows in a film down the 9o tubes.

Since each section 9, 10 is in one piece the outer surface of each' tube is continuous with the outer surface of each adjacent spacer,

hence a continuous'surface on each side of 95 the'device 'is presentedfto the owing product being treated andj there is no crack or crevicefvor ledge in AIor on which the product may lodge and complete cleansing of the device is evidently possible.

What I claim is:

1. In a device of the class described, two transversely corrugated sheets each sheet having substantially flat portions between the corrugations, the lower portion of each section being turnedv upwardly to form a. trough and the upper portion of each section being flared outwardly, the substantially flat portions ofthe sections being secured together to cause the opposed 'corru- Y` ated portions to form tubes and the upper ared portions to form a trough and means v at the opposite ends Aof the tubes to connectV them in series and form a continuous fluidV passageway through Vthe tubes.

2. A temperature. changing device comprising two sheets 'of material each sheet lhaving a plurality of spaced parallel channels formedtherein, the portionof the sheet above the uppermost channel being ilared outwardly and upwardly, the portions of the F sheets between the channels beingv secured 5;.53 together whereby the walls of corresponding channels in the sheets-form tubes and the 25 flared. portions form a trough and. means to connectthe tubes-in-series whereby lto form fa'continuous fluid passageway through the tube s. -f, r '1m Y. w y In witness'whereof I-have hereunto suba0 scribed my name.

v :xWALTER A. BARRETT. 

